To support the Spanish freedom fighters Miro painted a poster in loud, screaming colours. It shows a figure with an enormous clenched fist and a gigantic, muscular lower arm, crudely forceful and threatening to smash the enemies of freedom. In the same year, 1937, he also produced The Ploughman - a painting to express the horrors of war - for the Spanish Republican Pavilion at the Paris World Exhibition. It was a monstrously overwhelming combination of figures, comparable in its expressiveness to Picasso's Guernica.
In the present struggle I can see, on the one hand, the Fascists as an antagonistic force, on the other, the people. And it is the people whose extraordinary creative potential gives Spain an impetus that will surprise the whole world. "
- Joan Miro